Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
cac xuc » cam xuc, cac nuoc, chat xuc
vai cua » dai cua, hai cua, bai cua
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
lang co » lang o, nang co, tang co
tu lang » cu lang, tu lanh, xu lang
lai cua » dai cua, hai cua, lai chau
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) tu lang co hoc. hieu ve cac xuc van hanh ((vai cua) OR (lai cua)) cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) tu lang co hoc. hieu ve cac xuc van hanh ((vai cua) or (lai cua)) cac~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) tu lang co hoc. hieu ve cac xuc van hanh ((vai cua) or (lai cua)) cac*.